The cost of manufacturing x items is given by C(x) = 0.02x^2 + 20x + 1800. Find the marginal cost function. Compuare the marginal cost at x = 20 to the actual cost of producing the 20th item.

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@agent0smith can u help?

c(20)-c(19) = 2208 - 2187,22 = 20.78
it is just one algebraic mistake

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